Identify the hormones that are secreted in large amount prior to ovulation :
$A.$ $LH$
$B.$ $FSH$
$C.$ $Estrogen$
$D.$ $Progesterone$
$A\; only$
$A \;\&\;\ B \;only$
$A, B \;\& \;C only$
$A, B, C \;\&\; D$
Failure of descending testis into scrotum is known as
Aldosterone is secreted by
Each seminiferous tubule is lined on its inside by two types of cells $A$ and $B$. Which of the following options is correct, w.r.t. the type of cell and its function?
Which of the following structure originates from ectoderm
In some eggs, future organs can be demarcated even before cleavage begins. This type of development is called
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